Water, pH and Macromolecules
The lone pair electrons on oxygen in a H20 molecule

carry a partial positive charge
form covalent bonds in ice
carry a partial negative charge
are not important for the properties of water

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Water, pH and Macromolecules
Which of the following statements about water is correct?

Polar substances that can form hydrogen bonds will dissolve in it
Nonpolar substances like oils are not soluble in it
It is critical for many of the chemical processes found in living systems
All of these

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Water, pH and Macromolecules
Salt dissolves well in water as water molecules

make nonpolar covalent bonds with the positively charged ions only
form hydrogen bonds with the positively and negatively charged ions
surround the ions because of their charge but do not form hydrogen bonds
share electrons with the ions to make polar covalent bonds

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